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器件3D模型￥ 9.323
ADP5300ACPZ-1-R7 数据手册 - ADI（亚德诺）
制造商:
ADI（亚德诺）
分类:
稳压芯片
封装:
LFCSP-10
描述:
直流-直流开关降压稳压器, 可调, 2.15V-6.5V输入, 0.8V-5V输出, 500mA输出, LFCSP-10
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3D模型
符号图
焊盘图
引脚图
产品图
页面导航:
引脚图在P7P21Hot
典型应用电路图在P1P17P19
原理图在P3
封装尺寸在P21
焊盘布局在P18
型号编码规则在P21
功能描述在P1P7P21
技术参数、封装参数在P1P4P6
应用领域在P1P17
电气规格在P8
导航目录
ADP5300ACPZ-1-R7数据手册
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Data Sheet ADP5300
Rev. A | Page 17 of 21
APPLICATIONS INFORMATION
This section describes the external components selection for the
ADP5300. The typical application circuit is shown in Figure 41.
2.2µH
SW
PGND
FB
10µF
MLCC
10µF
MLCC
V
OUT
= 1.8V
PVIN
EN
VID
V
IN
= 2.15V TO 6.50V
ADP5300
VOUTOK
EPAD
SYNC/MODE
STOP
AGND
R2
1MΩ
R1
19.6kΩ
13366-041
Figure 41. Typical Application Circuit
EXTERNAL COMPONENT SELECTION
The ADP5300 is optimized for operation with a 2.2 µH
inductor and 10 F output capacitors for various output
voltages using the closed-loop compensation and adaptive slope
compensation circuits. The selection of components depends
on the efficiency, the load current transient, and other application
requirements. The trade-offs among performance parameters,
such as efficiency and transient response, are made by varying
the choice of external components.
SELECTING THE INDUCTOR
The high switching frequency of the ADP5300 allows the use of
small surface-mount power inductors. The dc resistance (DCR)
value of the selected inductor affects efficiency. In addition, it is
recommended to select a multilayer inductor rather than a
magnetic iron inductor because the high switching frequency
increases the core temperature rise and enlarges the core loss.
A minimum requirement of the dc current rating of the inductor
is for it to be equal to the maximum load current plus half of the
inductor current ripple (I
L
), as shown by the following equations:
SW
IN
OUT
OUT
L
fL
V
V
VΔI
–1
2
L
LOAD(MAX)
PK
ΔI
II
Use the inductor series from the different vendors shown in Table 6.
OUTPUT CAPACITOR
Output capacitance is required to minimize the voltage overshoot,
the voltage undershoot, and the ripple voltage present on the
output. Capacitors with low equivalent series resistance (ESR)
values produce the lowest output ripple. Furthermore, use
capacitors such as X5R and X7R dielectric capacitors. Do not
use Y5V and Z5U capacitors, because they are unsuitable
choices due to their large capacitance variation over temperature
and their dc bias voltage changes. Because ESR is important,
select the capacitor using the following equation:
L
RIPPLE
COUT
I
V
ESR
where:
ESR
COUT
is the ESR of the chosen capacitor.
V
RIPPLE
is the peak-to-peak output voltage ripple.
Increasing the output capacitor value has no effect on stability
and may reduce output ripple and enhance load transient response.
When choosing the output capacitor value, it is important to
account for the loss of capacitance due to output voltage dc bias.
Use the capacitor series from the different vendors shown in Table 7.
Table 6. Recommended Inductors
Vendor Model Inductance (μH) Dimensions (mm) DCR (mΩ) I
SAT
1
(A)
TDK MLP2016V2R2MT0S1 2.2 2.0 × 1.6 × 0.85 280 1.0
Wurth 74479889222 2.2 2.5 × 2.0 × 1.2 250 1.7
Coilcraft LPS3314-222MR 2.2 3.3 × 3.3 × 1.3 100 1.5
1
I
SAT
is the dc current at which the inductance drops 30% (typical) from its value without current.
Table 7. Input and Output Capacitors
Vendor Model Capacitance (μF) Size
Murata GRM188D71A106MA73 10 0603
Murata GRM21BR71A106KE51 10 0805
Murata GRM31CR71A106KA01 10 1206
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